Babnabus huberts and alexander crumbie



UNITED sTATEs PATENT oEEroE.

BARNABUS RUBERTS AND ALEXANDER CRUMBIE, OF BROOKLYN, NEW' YORK,ASSIGNORS TO THEMSELVES AND JOHN BENSON, OF SAME PLAGE.

ARRANGEMENT 0F PASSAGES AND MEANS FOR 'WORKING STEAM-VALVES BY THEDIRECT ACTION OF STEAM.

Specification of Letters Patent No. 18,225, dated September 15, 1857.

To all whom it may concern:

Be it known that we, BARNABUS RUBERTS and ALEXANDER ORUMBIE, ofBrooklyn, Kings county, State of New York, have invented a new anduseful Arrangement of Passages and Means for lVorking Steam- Valves bythe Direct Action of Steam; and we do hereby declare the following to bea full, clear, and exact description thereof, reference being had to theaccompanying drawings, figures and letters of reference thereon, makingpart of this specification.

Of the said drawings Figure 1 is a vert-ical longitudinal section of ourimproved method of working steam valves. Fig. 2, is an end view of thesame. Fig. 3, is a top view of the cylinder having the steam chestremoved in order to show the valve ports, etc. Fig. 4, is a verticaltransverse section of the cylinder.

Similar letters of reference indicate like parts in all the drawings. A

The nature of our invention consists in so arranging and working thevalves that we are enabled to make a simple, cheap and economicalengine, as will be more fully explained hereafter.

To enable others skilled in the art to make and use our invention wewill describe its construction and operation.

A, represents the cylinder which has eduction and induction ports as inordinary engines.

B, is the piston head.

D, D, are the cylinder heads.

E, is the gland for stuffing the piston rod O.

F, F, are the channels through which steam passes to the cylinder.

G, is the exhaust port.

H, is the valve.

I, is the valve rod.

J, J, are small pistons which by the pressure of steam thereon operatethe valves. K, K, are cylindrical chambers in which these pistons move.

L, is a gland for packing the valve rod.

A is the steam chest, the construction of which is plainly shown by Fig.1.

M, is the steam chest cover and N, is the supply pipe for steam to enterthe cylinder.

:Operation: In Fig. l, the piston is shown as being at the end of thestroke with the piston head at the left. Steam being admitted to thesteam chest A', it passes down into the cavity (c) at the left side, andthence under the valve cavity (d) and thence to the cylinder, asindicated by the arrows, and starts the piston by the pressure of steamtoward its other end, while the steam contained to the right of thepiston is pass ing out of the exhaust port G, as indicated by thearrows.

At each end of the cylinder on the side next the steam-chest are twoholes or ports (a, 5,) passing through and connecting with the cylinder,which holes have a passage (f) cast in the side next the steam chestequal in area to the holes which pass through the cylinder, as shown inFig. 1 at (a, o). These holes are alternately opened and closed by thetravel of the piston head which is wide enough to cover, or nearly coverboth during its movements. On the cylinder and near the holes (a, ZJ)there is another hole gc) p)assing through the same as t-he holes Thesteam chest is cast so as to allow a steam space A as seen by the whitespace in Fig. 1, while at each end it is so arranged as to allow thechambers K, K, in which the pistons J, J, work, which are secured to thevalve rod in any proper manner. In the steam chest are arranged holes orports (a, 0,) so as to match those in the cylinder and thereby formdirect communication between the pistons J, J, and cylinder A, as shownin Figs. 1, 2, and 4:.

The valve rod I, has its bearings as shown in Fig. l, and is secured tothe saddle of the valve by collars (g, g) and pins or screws as may bemost convenient.

The valve H, is shown in position to exhaust from the right end of thecylinder and receiving steam at the left to drive the piston to theright, and no movement of the valve will take place until the piston haspassed far enough so that the side toward the left, shall pass by thehole (a), at the right end of the cylinder when a volume of steam willrush up through the hole (a), and act upon and force the piston J, atthat end of the steam chest to change the valve from left to right.rllhe object of the port (b) is to give an additional impulse to thepiston J, which is done by the piston B,

again passing toward the left, Which movement shuts the port (a) uponthe inside of the cylinder and leaves (b), open, so that prime steamcontained behind the piston B, Will rush the port (.71), and through thechannel (f) to (a) and assist t-he piston J to its full movement Whichoperation being repeated insures a reciprocating motion of the piston B,by the pressure of steam acting alternately upon the pistons J, J.

The purpose of the port (c) is to equalize the pressure of steam uponthe pistons J, J, which will appear plain from the fact that steam beingon both sides of the piston J, at one end of the steam chest, of equalpressure, the admission of steam on the opposite side Will force theValve in either direction as the steam is admitted through the port-s aWe would remark that the steam in the piston chambers, K, K, readilyexhausts out- With the steam in the main cylinder.

We are aware that the valves of steam engines actuated bysteam pressureapplied to pistons other than the main Working pistons have been used,and therefore We disclaim such use. We are also aware of the patent ofNorman W. Wheeler, July 31st, 1833, and We therefore claim no part,device or thing patented to him. But

7e do claim as our invention- The arrangement of the steam channels a,b, c, which are opened and closed by the travel of the main piston,connecting the steam chest and cylinder as described: in combinationWith the pistons J, J, of equal areas or their equivalents,substantially as described and set forth.

B. RUBERTS. ALEXANDER CRUMBIE.

L. s. [1.. s]

